<html>
<head>
<script type="text/javascript" src="dygraph-combined.js"></script>
</head>
<body>
<div id="graphdiv4"
  style="width:480px; height:320px;"></div>
<script type="text/javascript">
  g4 = new Dygraph(
    document.getElementById("graphdiv4"),
    "twonormals.csv",
    {
      rollPeriod: 7,
      showRoller: true,
      errorBars: true,
      valueRange: [50,125]
    }
  );
</script>
</body>
</html>